Issue #001

April 2, 2026

Retail Media Signals

The best retail media activations, curated weekly

ChatGPT Gets Shelf Space, Costco Builds Digital End Caps, and Walmart Turns TV Into Checkout

Welcome to the very first issue of Signals — a weekly newsletter for the people building, buying, and selling retail media across every channel and format.

Each week, we scout the landscape for the most notable activations in OOH, DOOH, in-store, promo, pop-ups, and digital retail media. Then we break down what makes them worth your attention.

Whether you sit on the buy side planning the next campaign or the sell side monetizing the next screen, this newsletter is your five-minute briefing on what's actually working in the $150B+ retail media ecosystem.

Let's get into it.

01

CTV / Connected Commerce

Walmart Connect Turns CTV Into a Checkout Lane

Walmart, Vizio, L’Oréal

Walmart Connect and Vizio Ads debuted a content-to-commerce activation with L’Oréal at NewFronts, merging TV home screens, streaming environments, and Walmart’s closed-loop purchase data into a single connected buy. This is retail media graduating from banner inventory to programmable demand capture — and it’s exactly where the biggest CTV budgets want to go. For sell-side operators watching CTV eat into linear budgets, this is the playbook for making shopper data the new currency of living-room media.

02

AI-Assisted Commerce

Target Places Sponsored Products Inside ChatGPT

Target (Roundel), OpenAI, Pentaleap

Target’s Roundel partnered with OpenAI and Pentaleap to surface context-aware sponsored product recommendations directly inside ChatGPT conversations. It’s the first major retailer placement inside an AI assistant’s answer flow — not a banner beside it, but embedded in the recommendation itself. If consumers increasingly ask AI what to buy, the retailers who show up inside that moment will own a slice of intent that search engines used to monopolize.

03

AI-Assisted Commerce

Albertsons Brings Grocery Media Into the AI Answer Box

Albertsons Media Collective

Albertsons followed Target into ChatGPT, letting brand partners surface sponsored products when shoppers ask category and purchase-intent questions. Grocery retail media has always been strongest closest to the cart — Albertsons is testing whether that same conversion logic can travel upstream into AI-assisted meal planning and category discovery. Two major grocers inside ChatGPT in the same quarter is a signal, not a coincidence.

04

Off-Site Video / Programmatic

Kroger Turns Shopper Data Into Off-Site Video Fuel

Kroger Precision Marketing, Google

Kroger Precision Marketing expanded its Google integration so advertisers can activate Kroger’s first-party shopper data across YouTube and Display & Video 360 campaigns — planned, activated, and measured with actual sales signals. This is the next phase of retail media: networks acting as data and measurement layers for the open web, not just owners of on-site placements. For brands with big video budgets, this means retail media value now travels to premium inventory where the money already is.

05

Measurement & Data Infrastructure

Instacart Launches Data Hub — A Self-Serve Clean Room

Instacart

Instacart rolled out Data Hub, a self-serve clean room built with Google Cloud that gives brand teams direct access to campaign analysis, audience insights, and cross-channel measurement. In a market where marketers are demanding fewer black boxes and more usable data, Instacart just positioned itself as a measurement partner — not just an ad platform. Smart move to stay central even as media dollars spread across multiple retailers.

06

On-Site / Digital Merchandising

Costco Builds “Digital End Caps” for a Low-Ad-Load Future

Costco (Velocity)

Costco’s retail media arm Velocity introduced personalized digital end caps that use browsing and purchase behavior to tailor featured products — borrowing physical merchandising logic for digital surfaces without creating ad clutter. For an advertiser-coveted retailer that has historically been restrained about media monetization, this is a significant signal. It proves that even low-ad-load environments can monetize attention when the media feels like merchandising, not interruption.

What We're Watching

AI Assistants Are Becoming Retail Media Surfaces

Two major retail media networks placed sponsored products inside ChatGPT in the same quarter. This isn’t experimental anymore — it’s the beginning of a new media channel. The retailers that build native placements inside AI discovery flows will capture intent before consumers ever reach a search bar or a store. Watch for Amazon and Walmart to make similar moves by Q3.

Retail Media Networks Are Becoming Full-Stack Media Businesses

The common thread across this month’s launches: portability. Shopper data, sponsored products, and closed-loop measurement are moving into CTV, off-site video, AI assistants, and clean rooms. Retail media is no longer just “ads on the retailer’s website.” The winners will be networks that can make their signals travel across channels without losing trust or proof of performance.

The Measurement Layer Is the New Moat

Instacart’s Data Hub and Kroger’s Google integration both point to the same bet: the real value isn’t the ad placement, it’s the measurement infrastructure underneath it. As brands spread budgets across more retailers and channels, the networks that offer the cleanest attribution and most accessible data will hold onto the biggest shares of spend.

The Signal

If there's one takeaway from this inaugural issue, it's this: retail media is breaking out of the retailer site and becoming infrastructure. The next wave of growth won't come from adding more ad units to product pages. It will come from making shopper data, closed-loop measurement, and sponsored placements travel to wherever consumers are discovering, considering, and buying products — from living-room TVs to AI chatbots to open-web video.

The retailers that figure out portability will win. The brands that recognize this shift will get there first.

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If this issue sharpened your view of where retail media is heading, forward it to the one colleague who still thinks retail media is just sponsored search with better margins.

See you next Wednesday.

— The Signals Team

Signals · Retail media, decoded.

Sources

AdExchanger — NewFronts 2026: Vizio And Walmart Connect Team Up For L’Oréal Campaign (March 25, 2026)
Pentaleap — Target, OpenAI, and Pentaleap Launch Contextual Product Placements in ChatGPT (February 12, 2026)
Digiday — Albertsons Media Collective taps ChatGPT as the latest platform for media buys (March 5, 2026)
Kroger Precision Marketing — Kroger Precision Marketing Expands Collaboration with Google (March 24, 2026)
Instacart — Instacart Launches Data Hub (March 26, 2026)
MediaPost — Costco Tests Tailored Digital End Caps (March 20, 2026)